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Hrmm... The only thing I can think of will only work because you are only using two mail servers:<br />
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Configure each server to allow relays from the other. &nbsp;Then configure postfix on each server to relay mail through the other. &nbsp;The other server should recognize messages destined for local delivery. &nbsp;Since this is a closed environment, that should do the trick.<br />
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Hrmm... The only thing I can think of will only work because you are only using two mail servers:

Configure each server to allow relays from the other.  Then configure postfix on each server to relay mail through the other.  The other server should recognize messages destined for local delivery.  Since this is a closed environment, that should do the trick.



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Wow, that made me giggle :)<br />
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Thanks so much. <br />
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Wow, that made me giggle :)

Thanks so much.



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I want to set up 2 postfix servers for giggles. <br />
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I want 2 &quot;email clients&quot; per server and want to be able to email from / to any of the four clients. &nbsp;<br />
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I know I need a mx record to send mail, I just so not want to set up a dns server just for that. <br />
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I want to set up 2 postfix servers for giggles. 

I want 2 "email clients" per server and want to be able to email from / to any of the four clients.  

I know I need a mx record to send mail, I just so not want to set up a dns server just for that. 



can I put a mx entry in my /etc/hosts ?

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.

Email Servers

A Linux distribution is an operating system made as a software collection based on the Linux kernel and, often, on a package management system and are available for a variety of systems. A typical Linux distribution comprises a Linux kernel, GNU tools and libraries, additional software, documentation, a window system (the most common being the X Window System), a window manager, and a desktop environment. Most Linux systems are open-source software made available both as compiled binaries and in source code form, allowing modifications to the original software. Over three hundred distributions are in active development, including commercially backed distributions (such as Fedora, openSUSE and Ubuntu) and community-driven distributions (such as Debian, Slackware, Gentoo and Arch Linux).